Answer
This question was answered on January 26, 2005.
Much of the information contained herein may have changed since posting.
How to receive a fax
To receive a fax from within Windows XP, you must first enable and configure the Fax service; you have to select the Enable Receive check box in the Fax Configuration Wizard to receive faxes. For additional information about using the Fax Configuration Wizard, click the following article number to view the article in the Microsoft Knowledge Base: If you have configured Fax to automatically receive faxes in the Fax Configuration Wizard, it will attempt to answer the fax line after the number of rings that you specified.